WordPress 3.4.2 is available! Please update now

On September 6, 2012, WordPress 3.4.2 was released the maintenance and security update. It’s now available for download. For version 3.4.2, the database version (db_version in wp_options) changed to 21707. From the announcement post, this maintenance release addresses 18 bugs with version 3.4 and 3.4.1, including:

Fixes some issues in the admin area where some older browsers (IE7, in particular) may slow down, lag, or freeze.

Fixes an issue where a theme may not preview correctly, or its screenshot may not be displayed.

Fixes the use of multiple trackback URLs in a post.

Prevents improperly sized images from being uploaded as headers from the customizer.